The daughter of Fleetwood Mac producer Ken Caillat, clean-scrubbed adult alternative it-girl Colbie Caillat offers a fluffy alternative for “Grey’s Anatomy” viewers who find Norah Jones too heavy and Jason Mraz too dark. Caillat’s latest serving of Splenda-sweetened, decaf coffeehouse pop is last year’s Breakthrough, which she brewed with an army of producers and songwriters, including “American Idol” judge Kara DioGuardi.
Colbie Caillat
Tonight @ Briggs & Stratton Big Backyard, Summerfest, 8 p.m.
